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GRADIENT ADAPTIVE IMAGE RESTORATION AND ENHANCEMENT Hongcheng Wang
 

Summary: GRADIENT ADAPTIVE IMAGE RESTORATION AND ENHANCEMENT
Hongcheng Wang
, Yunqiang Chen
, Tong Fang
, Jason Tyan
, Narendra Ahuja

Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL 61801

Intelligent Vision and Reasoning Dept., Siemens Corporate Research, Princeton, NJ 08536
ABSTRACT
Various methods have been proposed for image enhancement
and restoration. The main difficulty is how to enhance the
structures uniformly while suppressing the noise without arti-
facts. In this paper, we tackle this problem in the gradient do-
main instead of the traditional intensity domain. By enhanc-
ing the gradient field, we can enhance the structure uniformly
without overshooting at the boundary. Because the gradi-
ent field is very sensitive to noise, we apply an orientation-
isotropy adaptive filter to the gradient field, suppressing the

  

Source: Ahuja, Narendra - Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign

 

Collections: Computer Technologies and Information Sciences; Engineering